The fragmentary volume "Supplementary Annotations of Yu's Traces of Mountains and Seas" found at the flea market was read by Chen Yanzhi for three years and was still regarded as a curiosity. Until the third night, the cinnabar annotations on the pages of the book came to life, and actually contained the secret key to entering the "Xuanzhou" world of immortality. When the moonlight overflowed, he mixed cinnabar with rootless water and soaked wooden nails with blood on his fingertips to lay out the Beidou formation. The gap opened in response, and spiritual energy and fairy sounds came from the gap. But just when he was about to step into the path to immortality, hurried footsteps suddenly sounded at the entrance of the alley. How should he seize the only opportunity in this life?